code: def __post_init__(self):
      assert self.identifier in ALLOWED_LAYOUT_MODEL_IDENTIFIER_NAMES
  
file_path: layout-parser/src/layoutparser/models/model_config.py
imports: from dataclasses import dataclass
label_desc: Use image node_id 1 for calling the LayoutModelConfig obj's underlying member method code with example usage: obj.__post_init__() without return types